Zvi Kedem and Kirthi Krishna Muntimadugu

A General Method for Energy-Error Tradeoffs in Approximate Adders

Abstract:

Approximate adders are adders with conventional architectures run in an overclocked mode. With this mode, erroneous sums may be produced at the savings of energy required to execute the computation. The results presented in this report lead to a procedure for allocating the available energy budgets among the adders modules so as to minimize the expected error. For simplicity, only the uniform distribution of the inputs is considered.